﻿#include "Nguoi.h"
#include "NguoiAnh.h"
#include "NguoiViet.h"
#include <conio.h>
int main() {
	Nguoi *n;
	NguoiViet nv;
	NguoiAnh na;
	n = &nv;
	n->Chao(); // (*)
	n = &na;
	n->Chao(); // cung dong code voi(*) nhung lai cho ket qua khac
	_getch();
	return 0;
}
